C++builder Cxgrid 怎么显示行号？

http://topic.csdn.net/u/20100912/14/b42949e0-c784-40b3-b2f1-8739a1e03e81.html?39130

看见网友提问，故做了个列子：

//cxGrid1DBTableView1 设置属性//OptionsView.Indicator = True//OptionsView.IndicatorWidth = 40//宽度void __fastcall TForm1::ADOQuery1AfterOpen(TDataSet *DataSet){ if(DataSet->RecordCount> 0) cxGrid1DBTableView1->OptionsView->IndicatorWidth = Canvas->TextWidth(IntToStr(DataSet->RecordCount)) + 4 ;}//---------------------------------------------------------------------------void __fastcall TForm1::cxGrid1DBTableView1CustomDrawIndicatorCell(TcxGridTableView *Sender, TcxCanvas *ACanvas, TcxCustomGridIndicatorItemViewInfo *AViewInfo, bool &ADone){ String FValue ; TRect FBounds ; if(dynamic_cast<TcxGridIndicatorRowItemViewInfo *>(AViewInfo)) { FValue =IntToStr(dynamic_cast<TcxGridIndicatorRowItemViewInfo *> (AViewInfo)->GridRecord->Index+1); FBounds = AViewInfo->Bounds; ACanvas->FillRect(FBounds); ACanvas->DrawComplexFrame(FBounds,clBtnHighlight,clBtnShadow,TcxBorders(),1); InflateRect(&FBounds,-1, -1); ACanvas->Font->Color = clBlack; ACanvas->Brush->Style = bsClear; ACanvas->DrawTexT(FValue,FBounds,cxAlignCenter||cxAlignTop); ADone = True; }}//---------------------------------------------------------------------------void __fastcall TForm1::Button1Click(TObject *Sender){ ADOQuery1->Open() ;}//---------------------------------------------------------------------------